When a reduce worker is notified by the master about these locations, it uses remote procedure calls to read the buffered data from the local disks of the map workers.

负责reduce任务的worker接收到这些位置信息以后，使用RPC读取这些数据。

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Each time a procedure calls itself, it USES more of that space for additional copies of its local variables.

每当程序呼叫其本身时，它会使用该空间以外的空间，处理其区域变数的其他复本。

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However, if that procedure calls other procedures, the local variables retain their values while the called procedures are running.

但是，如果该程序呼叫其他程序，区域变数在受呼叫程序执行时将保留它们的值。

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